1 files changed, 32 insertions, 7 deletions
diff --git a/src/world.odin b/src/world.odin
index 1e22cb1..d2e8601 100644
--- a/src/world.odin
+++ b/src/world.odin
@@ -3,11 +3,20 @@ package demonchime
 import rl "vendor:raylib"
 
 Object_Spawner :: proc(Object_Resource)
+Room_Change_Callback :: proc(Room_Id)
 
 current_room: Room_Position_Resource
 
 object_spawners := [Object_Type]Object_Spawner{
   .PLAYER_SPAWN = object_spawner_player_spawn,
+  // .COLLISION = object_spawner_collision,
+}
+
+room_open_cb := []Room_Change_Callback{
+  on_room_open_platforms,
+}
+
+room_close_cb := []Room_Change_Callback{
 }
 
 @(private = "file")
@@ -15,10 +24,28 @@ spawn_objects :: proc(room_id: Room_Id) {
   room := get_room(room_id)
 
   for obj in room.objects {
-    object_spawners[obj.type](obj)
+    spawner := object_spawners[obj.type]
+    if spawner != nil {
+      spawner(obj)
+    }
   }
 }
 
+@(private = "file")
+_open_room :: proc(room_pos: Room_Position_Resource) {
+  for cb in room_close_cb {
+    cb(current_room.id)
+  }
+
+  current_room = room_pos
+
+  for cb in room_open_cb {
+    cb(current_room.id)
+  }
+
+  spawn_objects(current_room.id)
+}
+
 open_room_at :: proc(pos: [2]i32) -> bool {
   pos := pos
   pos += {current_room.x, current_room.y}
@@ -32,8 +59,7 @@ open_room_at :: proc(pos: [2]i32) -> bool {
        pos.x <= room_pos.x + room_pos.width &&
        pos.y >= room_pos.y &&
        pos.y <= room_pos.y + room_pos.height {
-      current_room = room_pos
-      spawn_objects(current_room.id)
+      _open_room(room_pos)
       return true
     }
   }
@@ -43,8 +69,7 @@ open_room_at :: proc(pos: [2]i32) -> bool {
 open_room :: proc(id: Room_Id) -> bool {
   for room_pos in world {
     if room_pos.id == id {
-      current_room = room_pos
-      spawn_objects(current_room.id)
+      _open_room(room_pos)
       return true
     }
   }
@@ -79,9 +104,9 @@ draw_room :: proc(id: Room_Id) {
   iterate_room_tiles(id, draw_tile)
 }
 
-Map_Iterate_Callback :: proc(_: i32, _: i32, _: u32)
+Room_Iterate_Callback :: proc(_: i32, _: i32, _: u32)
 
-iterate_room_tiles :: proc(id: Room_Id, callback: Map_Iterate_Callback) {
+iterate_room_tiles :: proc(id: Room_Id, callback: Room_Iterate_Callback) {
   room := get_room(id)
 
   for layer in room.layers {